/Engine/Plugins/Online/OnlineSubsystem/Source/Public/OnlineSubsystemTypes.h
the stringified version of the enum passed in
namespace EOnlineComparisonOp { const TCHAR * EOnlineComparisonOp::ToString ( [EOnlineComparisonOp::Type](API\Plugins\OnlineSubsystem\EOnlineComparisonOp__Type) EnumVal ) }